Improvement in wagon-bolsters



o. E. emswoLn.

WAGON-BOLSTER;

Patented Jan.4, 1876.

Ava/(rm;

UNITED STATES PATENT OFFICE.

OTHO E. GRISWOLD, OF DODGE CENTRE, MINNESOTA.

IMPROVEMENT IN WAGON-BOLSTERS.

Specification forming part of Letters Patent No. 171,797, dated J anuary 4, 1876; application filed September 17, 1875. I

' its head will be flush with the upper surface of the bolster, all as hereinafter more fully set forth.

Figure 1 is a perspective view of a bolster with my improvement applied, the parts being shown partly in section. Fig. 2 is a perspective view of the socket, shown detached.

Ordinarily the king-bolt for lumber-wagons is made with a rectangular head, consisting of two laterally-projecting flanges at opposite sides, which are usually fitted into a corresponding recess cut in the upper surface of.

the bolster. Sometimes they are made with a round head, made oval or flat on top, and which usually projects above the surface of the bolster. In the former case the bolster is weakened by cutting away the wood to form the recess for the head of the king-bolt, while in the latter case the projecting head of the bolt prevents the bottom boards of the box from settling down level on the bolster, andultimately wears a hole 'in the bottom boards of the box. Whichever form is used the constant rocking of the bolster, and the great strain thereon, especially when the Wagon is heavily loaded, and is passing over uneven ground, soon so Wears and enlarges the hole in the bolster that the latter becomes weakened, besides being so loose as to tip one Way or the other, and ultimately breaks or becomes so worn as to be useless, necessitating the furnishing of a new bolster.

It is to remedy these difficulties that my invention is designed; and to this end I construct a strong metal tube or bushing, O, as represented in Fig. 2. As there shown this tube is made with an enlarged head, b, which has an internal recess, 0, to receive the correspondingly-shaped or round head of the kingbolt K when the parts are all in place, as represented in Fig.1. This head I) is provided at opposite sides with two ears, a, which have holes in them to receive screws to fasten the tube 0 in place in the bolster. The tube G is also provided with two V-shaped projections, which extend longitudinally along its sides, for the purpose of assisting to hold it more firmly in its seat in the bolster, they being shown in Fig.2.

If desired, screw-holes may also be made in bottom part of the head I), as represented in Fig. 2, for the purpose of inserting additional screws. 7

The tube or bushing 0 being thus constructed is inserted snugly in a suitably-prepared hole in the bolster A, as shown in Fig. l, and when secured therein the kin g-bolt K is inserted, as shown, with its head fittingin the recess 0, its top being flush with the top surface of the bolster, which may then be secured to the axle A, as represented. a

By this improvement all the objections or difficulties hereinbet'ore mentioned are entirely obviated, thereby saving much annoyance and expense, as the wear of the bolster by the king-bolt is prevented.

Having thus described my invention, what I claim is As an improvement in wagons, the bolster B, provided with the metal bushing 0, having the recessed head I), with the ears a or ribs 0, either or both, constructed and arranged to operate as and for the purpose set forth.

OTHO E. GRISWOLD. Witnesses:

JESSIE M.HUNT, (J. D. TUTHILL. 

